The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

This charming railway is one of the oldest and steepest funiculars in England.

A giant concrete orb in far north Iceland marks the ever-shifting boundary.

Wall after wall of this French seaside neighborhood is intricately decorated with seashells and corals.

An old wool-washing house filled with Fluxus contemporary art.

Ancient stone dildos and other odd pieces of medical history are displayed at this quirky Cyprus gem.

A statue of the early navigator stands overlooking the land he first surveyed.

Few would expect the world's oldest preserved oil refinery to be found in Sweden.

Elaborate patterns adorn the city's disappearing traditional architecture.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

The small sanctuaries lie just off the beaten path near one of Bhutan's most famous attractions.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

Nuclear waste experts study this prehistoric crater lake to envision landscapes one million years in the future.

The oldest surviving mosque in the UAE has mysterious origins and unusual architecture.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

The medieval network of canals hidden underneath the city is opened to explorers each year.

Perhaps the most scandalous statue of America's first president.

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

This quiet park's strange sedimentary spires were named after Kodak's color film.